Method of making artificial marble.



UNITED STAT PATENTL Ulilllilittlltih JAMES B. TURNER, OF CHICAGO.ILLINOIS.

METHOD OF MAKING ARTIFICIAL MARBLE.

No Drawing.

To all 7171 em if may emu-era Be it known ll at l. ,lAiii-zs B.'lt'uxua, a citizen of the United States and a resident of the eity ofChicago. eounty ol' toolz. and State of lllinois, have inventwl eertainnew and uselul lmprovements in hlethods ot ltlakine; Artificialltlarble. of which the following is a speeil ieat ion.

My invention relates to improvementsin methods of making a rtitieialmarble and has for its objeet the provision oi an improved method forthis purpose, which is simple economical, and highly ellieient in use.

The invention consists in the method of procedure hereinafter describedand elaimed.

The preferred method ot procedure eonsists in first forming or castingthe desired body in any desired form, of double-lmrned gypsum cement.sueh as Keene's eement, and then treating the surfaee of said body witha saturated solution of sulfate of potassium.

The body is then set; aside and exposed to the air for eight or ten dayswhen it is ready for polishing in the usual manner. and will be found tobe capable of readily receiving a high polish so that it cannot easilybe distinguished from genuine marble.

While I have set forth in detail the me.

t'crred method of procedure, the same is capable of variation andmodificationwithout departing from the spirit of my invention. I,therefore, do not wish to be limited to the exact steps set forth indetail,

but desire to avail myself of such variations and modifications as tallwithin the scope of tt i appended claims.

llaving described my invention What l claim as 110 and desire to seeareby lletters Patent is:

l. The method of making artilieiat marble which consists in forming! abody from double-lulrned gypsum eement and then treating the surface atsaid body with a solution of potassium sulfaten substantially asdescribed.

2. The method of making artificial marble which consists in forming abodv 't'rom douhle-lmrned ypsum eement ant then treating the suraee ofsaid body with a saturated solution of potassium sull'ate. substantiallyas described.

3. The method of. making artilieial man ble which consists in forming abody from double-hurned .gypsum cement. then treating the surface ofsaid body with a saturated solution of potassium sult'ate. and thenexposing the body to the aetion ol air for a number of days,substantially as described.

In testimony whereof I have signed my name to this speeilieation in thepresent-e of two subscribing witnesses.

' JAMES ll. 'ruaxaa.

Witnesses Josnua It. ll. Po'ers. llamas 1*. loans.

